Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
A proposed muon facility at RAON/Korea
1
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
A proposed muon facility at RAON/Korea
Eunil WonKorea University
International Symposium on Science Explored by Ultra Slow Muon, Aug. 9-12, 2013
1
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Contents
• A new accelerator under construction in Korea
• A proposal on a muon facility
✓ Ongoing work for a μSR facility design
✓ R&D for a charged lepton flavor violation experiment
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Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RISP or RAON• RISP: Rare Isotope Science Project (RISP) of Institute
for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, “RAON” for rare isotope science researches in Korea
3
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RISP or RAON• RISP: Rare Isotope Science Project (RISP) of Institute
for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, “RAON” for rare isotope science researches in Korea
3
• RAON: “라온”
- pure Korean word meaning Delightful, Joyful, Happy
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RISP or RAON• RISP: Rare Isotope Science Project (RISP) of Institute
for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, “RAON” for rare isotope science researches in Korea
3
• RAON: “라온”
- pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all
over the world and for the bright future of mankind.
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RISP or RAON• RISP: Rare Isotope Science Project (RISP) of Institute
for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, “RAON” for rare isotope science researches in Korea
3
• RAON: “라온”
- pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all
over the world and for the bright future of mankind.
• KoRIA: Korea Rare Isotope Accelerator
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RISP or RAON• RISP: Rare Isotope Science Project (RISP) of Institute
for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, “RAON” for rare isotope science researches in Korea
3
• RAON: “라온”
- pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all
over the world and for the bright future of mankind.
• KoRIA: Korea Rare Isotope Accelerator
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RISP or RAON• RISP: Rare Isotope Science Project (RISP) of Institute
for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, “RAON” for rare isotope science researches in Korea
3
• RAON: “라온”
- pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all
over the world and for the bright future of mankind.
• KoRIA: Korea Rare Isotope Accelerator
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
A Brief History of RISP
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Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
A Brief History of RISP
4
• ISBB plan (2009.1) • Preliminary Design Study (2009.3-2010.2)• Conceptual Design study (2010.3-2011.2)• International Advisory Committee (2011.7)• Institute for Basic Science(IBS) established (2011.11)
• Rare Isotope Science Project (RISP) launched (2011.12)• 1st RISP Workshop on Accelerator Systems (2012.5)• 1st Technical Advisory Committee (2012.5)• Baseline Design Summary (2012.6)• International Advisory Committee (2012.7)• KoPAS (Particle Accelerator School) (2012.12)• 2nd RISP Workshop on Accelerator Systems (2013.5)• 2nd TAC (2013.5)
• Technical Design Report (2013, summer)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
A Brief History of RISP
4
• ISBB plan (2009.1) • Preliminary Design Study (2009.3-2010.2)• Conceptual Design study (2010.3-2011.2)• International Advisory Committee (2011.7)• Institute for Basic Science(IBS) established (2011.11)
• Rare Isotope Science Project (RISP) launched (2011.12)• 1st RISP Workshop on Accelerator Systems (2012.5)• 1st Technical Advisory Committee (2012.5)• Baseline Design Summary (2012.6)• International Advisory Committee (2012.7)• KoPAS (Particle Accelerator School) (2012.12)• 2nd RISP Workshop on Accelerator Systems (2013.5)• 2nd TAC (2013.5)
• Technical Design Report (2013, summer)
Available from http://risp.ibs.re.kr
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Science @ RISP
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Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
History of Elements Discovery
6Source: B. Sherrill (Mathematica+Wikipedia)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
History of Elements Discovery
6Source: B. Sherrill (Mathematica+Wikipedia)
Cooper Age
IndiaBabyloniaEgyptChina
Democritus- Ideas of Atoms
1700+ rise of modern chemistry
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
History of Elements Discovery
7
Times of alchemist
Chemistry, Dalton’s atomic theoryCavendish, Priestly, Scheele, ... Mendeleev’s
Periodic Table
Source: B. Sherrill (Mathematica+Wikipedia)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
History of Elements Discovery
7
Times of alchemist
Chemistry, Dalton’s atomic theoryCavendish, Priestly, Scheele, ... Mendeleev’s
Periodic Table
Particle Accelerators
Source: B. Sherrill (Mathematica+Wikipedia)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
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Abundance of atoms
http://homepages.ius.edu/kforinas/CalssRefs/modern.html
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
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Abundance of atoms• Light elements are dominated (log scale!)
http://homepages.ius.edu/kforinas/CalssRefs/modern.html
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
8
Abundance of atoms• Light elements are dominated (log scale!)
http://homepages.ius.edu/kforinas/CalssRefs/modern.html
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
8
Abundance of atoms• Light elements are dominated (log scale!)
http://homepages.ius.edu/kforinas/CalssRefs/modern.html
✓ Where are they all from? ✓ Why is abundance so asymmetric?
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
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What we know so far...
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
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What we know so far... • Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
9
What we know so far... • Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis)
• Heavy elements up to Fe were produced by nuclear fusion in Stars
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
9
What we know so far... • Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis)
• Heavy elements up to Fe were produced by nuclear fusion in Stars
• Elements heavier than Fe were produced by consecutive capture of neutrons followed by beta decays (in violent astronomical processes such as Supernova explosion) s-process, r-process still to be understood!
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Origin of Elements
9
What we know so far... • Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis)
• Heavy elements up to Fe were produced by nuclear fusion in Stars
• Elements heavier than Fe were produced by consecutive capture of neutrons followed by beta decays (in violent astronomical processes such as Supernova explosion) s-process, r-process still to be understood!
One of main research topics at RISP
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
The Nuclear Landscape
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Chart of Nuclides (sometimes called a Segre Plot or Segre Chart)
Black squares are the around 260 stable isotopes found in nature (> 1 Gy)
Green closed are is the region of isotopes observed so far
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Science/applications
11
✓Nuclear Physics• Exotic nuclei near the neutron drip line • Superheavy Elements• Equation of state of nuclear matter• Nuclear structure
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Science/applications
11
✓Nuclear Physics• Exotic nuclei near the neutron drip line • Superheavy Elements• Equation of state of nuclear matter• Nuclear structure
✓Material Science• μSR/β-NMR• Production & Characterization of new materials
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Science/applications
11
✓Nuclear Physics• Exotic nuclei near the neutron drip line • Superheavy Elements• Equation of state of nuclear matter• Nuclear structure
✓Material Science• μSR/β-NMR• Production & Characterization of new materials
✓Particle/Atomic physics• Charged lepton flavor violation/Symmetry• EDM/Atomic trap
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Science/applications
11
✓Nuclear Physics• Exotic nuclei near the neutron drip line • Superheavy Elements• Equation of state of nuclear matter• Nuclear structure
✓Material Science• μSR/β-NMR• Production & Characterization of new materials
✓Particle/Atomic physics• Charged lepton flavor violation/Symmetry• EDM/Atomic trap
✓Nuclear Astrophysics• Origin of nuclei• Paths of nucleosynthesis• Neutron stars and supernovae
✓Medical and Bio sciences • Advanced therapy technology• Mutation of DNA• New isotopes for medical imaging
✓Nuclear data with fast neutrons• Basic nuclear reaction data for future nuclear energy• Nuclear waste transmutation
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Science/applications
12
✓Nuclear Physics• Exotic nuclei near the neutron drip line • Superheavy Elements• Equation of state of nuclear matter• Nuclear structure
✓Material Science• μSR/β-NMR• Production & Characterization of new materials
✓Particle/Atomic physics• Charged lepton flavor violation/Symmetry• Atomic trap
✓Nuclear Astrophysics• Origin of nuclei• Paths of nucleosynthesis• Neutron stars and supernovae
✓Medical and Bio sciences • Advanced therapy technology• Mutation of DNA• New isotopes for medical imaging
✓Nuclear data with fast neutrons• Basic nuclear reaction data for future nuclear energy• Nuclear waste transmutation
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Production of Rare Isotope Beam
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ISOL(Isotope Separator On-Line)p to thick target (eg. Uranium Carbide) : target spallation or fission (low energy)
RI Ions Re-acceleration
Stopping
RI Ion Beam
RI Beam
Stopped Beam experiment (Traps)
Fast Beam experiment
IF(In-Flight Fragmentation)Stable heavy ion beam → thin target → projec/le fragmenta/on (high energy)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Production of Rare Isotope Beam
13
ISOL(Isotope Separator On-Line)p to thick target (eg. Uranium Carbide) : target spallation or fission (low energy)
RI Ions Re-acceleration
Stopping
RI Ion Beam
RI Beam
Stopped Beam experiment (Traps)
Fast Beam experiment
IF(In-Flight Fragmentation)Stable heavy ion beam → thin target → projec/le fragmenta/on (high energy)
RISP has unique capability of producing RI in both ways
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Worldwide Existing/Planning Isotope Accelerator
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B. Sherrill
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RAON Site
15
• It is located to near Daejeon (~1 hour from Seoul by KTX)
We are hereDaejeon
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RAON Site
15
• It is located to near Daejeon (~1 hour from Seoul by KTX)
We are hereDaejeon
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
RAON Site
15
• It is located to near Daejeon (~1 hour from Seoul by KTX)
We are hereDaejeon
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Concept of RAON
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Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Concept of RAON
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Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University17
KPS 2012 (YKKIM/IBS)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
A proposed muon facility at RAON
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• “We” are proposing a muon facility at RAON
• Who are “we”?
A small group of high energy physicists who are interested in both μSR and charged lepton flavor violation experiments.
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Micro-Beam structure of RAON
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Continuous beam (for proton, 600 MeV/660 μΑ):- At RISP the accelerator structure (80 MHz microstructure) and the pion lifetime (26 ns) leads to a practically continuous surface muon beam
- But since one has to correlate incoming muon+ and the decay positron, one muon at a time to the sample should be achieved (otherwise it is background)
80 MHz = 125 ns
200 ps: from private communication with E. S. Kim @RISP/KNU
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Micro-Beam structure of RAON
20
Continuous beam:
- At RISP the accelerator structure (80 MHz microstructure) and the pion lifetime (26 ns) leads to a practically continuous surface muon beam
- But since one has to correlate incoming muon+ and the decay positron, one muon at a time to the sample should be achieved (otherwise it is background)
http://people.web.psi.ch/morenzoni/FS-2012/Chapter5-MuonSpinRotation-1.pdf
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Continuous vs. Pulsed
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Pulsed beam:
- At a pulsed machine all the muons are contained in a pulse (50-100 ns wide) with low repetition rate (25-50 Hz)
- This allows a higher rate (all the decay positrons of a pulse are measured at once)
- But only one positron in a detector or in the case of more than one, you have to get the time stamp on them
: such as J-PARC facility
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University22
It will be extremely beneficial if we have one continuous and one pulsed μSR facilities in Asian region !
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Muon Facility @ RAON
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μSR facility to be located here
Muon meeting 2013.05JHLee/RISP
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Muon Facility @ RAON
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3600 cmMuon meeting 2013.05
JHLee/RISP✓ Place is secured✓ Budget is not yet
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Muon facility R&D
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Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Muon production/transport/moderation
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- We are at early stage of conceptual design
Muon production
~10-5 surface muons/proton
Muon transport
ε(transport)~O(0.6-0.8)ε(collection)~O(3x10-2)
4x1015 protons/s
~104 thermalized muons/s
(660 uA)
(moderation: 10-5)
But don’t take this number too seriously yet
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University27
Ultra slow muon transport R&D- Einzel lens design simulation (CST)
Kyungmin Lee, Jihoon Choi/KU
- Result of simulation after field map into Geant4 (using PSI tool)
Moderated muons come in
: unit (mm)
ByeongRok Ko/KU
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
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- Some of us have been looking at a muonium oscillation experiment (but not limited to it)
- Various new fundamental interaction can cause Mu to anti-Mu transition
Phys. Rev. Lett. 82, 49 (1999)
- Not updated since 1999
- A new technique to reject accidental and irreducible backgrounds more effectively needed
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
29
arXiv:1307.5787 “Charged Lepton Flavor Violation: An Experimenter’s Guide” - by R. Bernstein and P. Cooper (Fermilab) - excellent review of cLFV experiments
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
29
arXiv:1307.5787 “Charged Lepton Flavor Violation: An Experimenter’s Guide” - by R. Bernstein and P. Cooper (Fermilab) - excellent review of cLFV experiments
Latest limit: Phys. Rev. Lett. 82, 49 (1999)- typical counter type- suffer from rate-dependent background- < 3x10-3 GF was achieved
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
29
arXiv:1307.5787 “Charged Lepton Flavor Violation: An Experimenter’s Guide” - by R. Bernstein and P. Cooper (Fermilab) - excellent review of cLFV experiments
Latest limit: Phys. Rev. Lett. 82, 49 (1999)- typical counter type- suffer from rate-dependent background- < 3x10-3 GF was achieved
M. Aoki, NIM A 503, 258 (2003)- a radiochemical approach- antimuonium absorbed in tungsten nucleus (μ- W →νμ 184Ta)- < 10-4 GF can be possible
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
29
arXiv:1307.5787 “Charged Lepton Flavor Violation: An Experimenter’s Guide” - by R. Bernstein and P. Cooper (Fermilab) - excellent review of cLFV experiments
Latest limit: Phys. Rev. Lett. 82, 49 (1999)- typical counter type- suffer from rate-dependent background- < 3x10-3 GF was achieved
M. Aoki, NIM A 503, 258 (2003)- a radiochemical approach- antimuonium absorbed in tungsten nucleus (μ- W →νμ 184Ta)- < 10-4 GF can be possible
arXiv:1307.5787- improve counter type experiment- use modern technology- could reduce limit by 10-2 (but with pulsed beam)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
29
arXiv:1307.5787 “Charged Lepton Flavor Violation: An Experimenter’s Guide” - by R. Bernstein and P. Cooper (Fermilab) - excellent review of cLFV experiments
Latest limit: Phys. Rev. Lett. 82, 49 (1999)- typical counter type- suffer from rate-dependent background- < 3x10-3 GF was achieved
M. Aoki, NIM A 503, 258 (2003)- a radiochemical approach- antimuonium absorbed in tungsten nucleus (μ- W →νμ 184Ta)- < 10-4 GF can be possible
arXiv:1307.5787- improve counter type experiment- use modern technology- could reduce limit by 10-2 (but with pulsed beam)
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
30
One slide R&D status
40 MeV e- in Xenon gas (atm)
10 MeV
8 MeV 4 MeV
Geant4 study for tracker is ongoing
✓ Improvement from CsI and faster timing
✓ Improvement from MWPC
✓ Muonium production R&D is starting with J-PARC people
✓ Active target ?
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Fundamental muon physics @ RAON
30
One slide R&D status
40 MeV e- in Xenon gas (atm)
10 MeV
8 MeV 4 MeV
Geant4 study for tracker is ongoing
✓ Improvement from CsI and faster timing
✓ Improvement from MWPC
✓ Muonium production R&D is starting with J-PARC people
✓ Active target ?
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Summary
31
Aug. 9-12, 2013 International Symposium on Science Explored by Ultra Slow Muon Eunil Won, Physics Department, Korea University
Summary
31
• A new accelerator under construction in Korea
• A proposed muon facility is described
✓ Conceptual design work for a μSR facility in progress
✓ R&D for a fundamental muon physics experiment is started
• One pulsed in Japan and one continuous μSR facility will be complementary and extremely beneficial to all of us